Furnace



June 5, 1923.

H. E. SMYTHE Filed Feb. 28 1921 WITNc-:ss

FURNACE 3 Sheets-Sheet 1 June 5, 1923.

H. E. .SMYTHE FURNACE Filed Feb. 2S 1921 H "H N 3 Sheets-Sheej: 2

"i MH N WIT N Ess 4Z. QW

June 5, 1923.

H. E. SMYTHE FURNACE 3 Sheets-Sheet 5 Filed Feb. 28 1921 Inn/Enron WITNESS Patented June 5, 1923.

iastate HORACE nsMYTHE, or PITTSBURGH,.'PENNSYLVANIA. .1

FURNAGE. .i f

Application med rebruaryzafieai.fsriai No. 443,684;

nace and air regeneratingmeans, wherein theA entrance of air to the regenerators is controlled by valves preferably of the poppet or mushroom type.

The object of the invention" is to provide a gas-burning reversing furnace with air re-.l generators whereby the air supply for pre-V liminary combustion andthe air supply for complete combustion may be seperately regulated, preferably by valves supplying air to the regenerators. hereinafter.

Referring to the accompanying drawings,

Fig. 1 is a horizontal section of my inven! tion taken .on twol planes, the section of the upper and lower portions being respectively taken on levels indicated by the lines I-I and Ia a of Fig. 2; Fig. 2, a vertical longitudinal section on the line II-II of Fig.

1, the upper part following the line IIa- IF of Fig.'3; Fig. 3, a central vertical longitudinal section of one end of the furnace,

' the section being along the line IIL-III of Fig. 4; Fig. 4, a horizontal section on the line IV-IV of Fig.l 3; yand Fig. 5, a vertical i' section on the line V -V of Fig. 1.' Fig. 5 is also a section of the structure shown on thev line V-Va of Fig. 1, with the reference numerals 17 and 17 of Fig. 5 changed to 16.

anale. y y On the drawings, I have shown, except on Fig. 4, only one endv of a reversing furnace, and only a single section in a single plane of each pair of regeneratorsbut it is to be understood vthatfthe omitted end of the furnace is constructed precisely like that shown, and that both pairs of regenerators are precisely' alike. The parts4 of the two sets of regenerators have the same numerals except that those of one` setvhave prime marks added.

1 designates the melting chamber having centrally beyond each end thereof the arched-over combustion chamber 2 opening outwardly toward the melting chamber and downwardly at its rear end into the air flue 3 leading downwards to the passage 4.

At each side of the arched chamber 2 is Other objects appear a flue 5, opening into the kfurnace chamber 6 whichopens into .l the' chamber 1.r iiuesfflead below to the passage 7 lparallel with,l and lat 'the' sidej'of, the passage 4.

`vEach p'air vof regenerators erator chambers v8 and 9, separated by the partition wall 10, whi,chisan'extension of the partition walli 11 separating the passages 4 and 7.y Each regenerator 8 lies at the side of a regenerator 9 and they are connected respectively at onefend to the passages 7 and 4'by. the passages 12 and v13, and at the other end to the separate valve chambers/14'and'15 by the yseparate passages 16 and 17 provided withy the blast pipes 18. Each valve chamber has an inlet 19 closed by Ia mushroom or poppet valve 20 and an outlet 21 close'dby a `mushroom or poppet valve 22. The outlets of all the chambers 14and l5 lead to vthelstack chamber 23 leading tothe stack flue 24, having the damper 25". y

Gas is fedinto the sidesof ythe prelimi-l 26 between the flue 3 and the chamber 1 and into "the combustionv chamber l2 by the pipes 2610 betweenv the flues 3 andthe chamber 1'.v l y .Assuming thatl the valves 2O and.22 for the chambers `14and 15 at the upperjside of F ig.v 1 are as shown'on the left side of Fig. V45, 4andvthat the valves inv the other chambers 14 and'15 are as shownwon the rightl side` lof Fig. 5, fresh air enters the open ports19, whence itvpasses through the flues or passages 16and 17 'tothe Vrespective regenerators 8 andi). From the regenerator 9 air goes through the passages 13 and ,4 and the b has its regen- 'flue 3 t0 the .combustionl nary combustion'y chamber 2 )bythe pipes "80k chamber 2 toI support the combustion of the gas issuing fromthe'gasvpipes 26, while air the the chamber 6 andfthence to the chamber 1 to complete the combustion 0f the gas'. The burningv gases pass through the chamber 1 and thence in va reverse direction through the other end of the furnacein` a well known manner down the flues 3 and 5 to the regenerators 8 and 9 and thence through the liues 16* and 17 to the valve chambers 14 and 15 and thence-down through the open `ports 21 to the chamber 23 'and stack flue 24. Blast may be applied to one or both the. pipes 18 as `may be necessary or desired, or the valve v20l for one port 19 Ipasses'"from-'the regenerator 8' .through ,passages y12 and, 7 .and f the ilues; 5 tov may be closed or one or both may be partly closed to introduce the required amount of air to the different llues 3 or 5 or both. To reverse the furnace, the gas is out o from the gas pipes 26" and turned on to the pipes 261. The position of the valves 20, 20', 22, and 22 are all reversed from Jthe positions shown on Fig. 5. Air will then pass through the ports 19 and through the lines 16 and 17 to the regenerators 8 and 9 and thence in .an obvious manner from the lower part of Fig. 1 to the ues 3 and 5 to the combustion chamber 2 and the chamber 1 and thence through the chamber 1 and down the flues 3 and 5 and through the regenerators 8 and 9 and the flues 16 and 17 to the stack chamber 23 by way of the open ports 21.

The description just ural draft for the air, but in ease forced draft yis used, the ,valves 2O will be vclosed for .the regenerators taking .in fresh air, which will be taken in through the blast pipes 18. valves 20 and 22 will be closed and the valves 2O closed and the valves 22 opened, freshair being taken in through blast pipes (not shown) for the other regenerators. Natural draft may be used for one regenerator 8 or 8 and Aforced draft used for the other regenerator 9 or 9.

Att-he rear end of the regenerators' and 9 are the` arched passages 25 and 26 extending transversely of the passages 16 and `17 and communicating therewith. The passages 25 and 26 are unobstructed and provide a large amount of room for the air and ,gases passing between the regenerators and the passages 16 and 17. Thesepassages 25 and 26 do away with a large amount of friction of the air and waste gases in the spaces usually occupiedby checkerwork.

I claim: y

1. A furnace structure having a melting chamber, a preliminary combustion chamber at each end thereof, and means supplying fuel gas to each combustion chamber, in combina-tion with two pairs of air regenerators, means connecting` one member' of each pair to the respective combustion chambers, means connecting the other member of i each pairtto the respective ends of the furnace chamberto completecombustion and given requires nat-` Upon reversal of the furnace the protect the roof of the latter chamber, a stack flue, separate passages leading outwardly from each regenerator, a valve chamber, one for each passage, the chamber beingA :outside the Lfurna structure, a poppet valve to admit fresh air to each chamber, and a poppet valve to admit waste gases from each chamber to the stack flue, whereby fresh air may be admitted in regulated quantities to each regenerator of either pair of regenerators while the stack` flue may be connected to carry out waste gases from the remaining pair of regenerators.

2. A furnace having a melting chamber, a preliminary combustion chamber at each end thereof, and means supplying fuel gas to each combustion chamber, in combinai tion with two pairs of air regenerators,

means connecting` one member of each pair to the respective combustion chambers, means connecting the other member of each pair to the respective ends of the furnace chamber to complete combustion and protect the roof of the latter chamber, a stack Hue, separate passages leading outwardly from each regenerator, a valve chamber, one for each passage, the chamber being outside the furnace structure, a poppet valve to admit fresh air to each chamber, a. `poppet valve to admit waste gases from each chamber to the stack flue, whereby fresh air may be admitted in regulated quantities to eachl regenerator of either pair of regenerators while the stack flue may be connected to carry out waste gases from .the remaining pairof regenerators, andmeans for supplying an air blast to the said separate passages.

3. A melting chamber, a gas burner therefor, and regenerator containing checker-` work, a passage leading from the melting chamber-@to the upper part of one end of the regenerator, a. passage for fresh air and waste gases, leading from the lower part of the other end of the regenerator, and a passage free from checker-work and extending across the rear end of the regenerator and communicating directly with the second passage, whereby friction of theair and waste gases passing between the -regeneratorand the second passage 1s lessened.

Signed at Pittsburgh, Pa., this 18th day of February, 1921.

HORACE E. SMYTHE. 

